Question

the postganglionic fibers that innervate glands in the body wall or smooth muscles in limbs are
posterior ramus.
white rami communicantes.
anterior ramus.
dermatomes.
gray rami communicantes.

Explanation:

Gray rami communicantes are postganglionic fibers that carry sympathetic innervation to glands in the body wall or smooth muscles in limbs. Posterior ramus innervates the back muscles and skin. White rami communicantes carry preganglionic fibers. Anterior ramus innervates the anterior and lateral trunk and limbs (but not specifically as postganglionic for these structures in the question context). Dermatomes are areas of skin innervated by a single spinal nerve.

Answer:

gray rami communicantes.